Hawā is the inclination of one’s nature to what suits it and that should not be criticized when what is sought after is lawful. However, it should be dispraised when one is excessive in following Hawā. That said, when Hawā is criticized in an absolute manner, it is because most of it is either impermissible, or because people usually interpret lawfulness, and hence indulge in it in excess.
Know that part of the inner self is intellectual, the virtue of which is wisdom, the vice of which is ignorance, part of it is elicited, the virtue of which is poignancy, the vice of which is cowardice, part of it is lustful, the virtue of which is chastity and the vice of which is unrestrained Hawā. Exhibiting patience in the face of vice is a merit of the inner self by which a person endures both goodness and evil. Therefore, whoever lacks patience and allows his Hawā to lead his mind has then made the follower be followed and the led a leader. That said, it is expected that everything he desires will return to him and that he will be harmed from where he expected to benefit; he will be saddened by that which he expected happiness to come from.
Tawheed First 